Ticket sales for the Delft Chamber Music Festival are handled by the Nationale Theaterkassa. 
Ticket sales start June 1st, at 12:00 AM.
Most of the concerts in the Van der Mandelezaal your seats are marked. For the other concerts free choice of seats applies. The tickets will be sent by e-mail and must be printed out to the concert, along with your discount card (Delft / Rotterdampas, UITpas or CJP, student card).

Please find here the manual to order tickets.